<?php
/**
 * TbTabs class file.
 * @author Antonio Ramirez <ramirez.cobos@gmail.com>
 * @copyright Copyright &copy; Christoffer Niska 2013-
 * @license http://www.opensource.org/licenses/bsd-license.php New BSD License
 * @package bootstrap.widgets
 */

Yii::import('bootstrap.behaviors.TbWidget');

/**
 * Boostrap tabs widget.
 */
class TbTabs extends CWidget
{
	/**
	 * @var string the type of tabs to display. Valid values are 'tabs' and 'pills' (defaults to 'tabs').
	 * @see TbHtml::$navStyles
	 */
	public $type = TbHtml::NAV_TYPE_TABS;
	/**
	 * @var string the placement of the tabs. Valid values are 'right, 'left' and 'below'.
	 * @see TbHtml::tabPlacements
	 */
	public $placement;
	/**
	 * @var array the tab configuration.
	 */
	public $tabs = array();
	/**
	 * @var array additional data submitted to the views.
	 */
	public $viewData;
	/**
	 * @var string a javascript function that This event fires on tab show, but before the new tab has been shown.
	 * Use `event.target` and `event.relatedTarget` to target the active tab and the previous active tab (if available)
	 * respectively.
	 */
	public $onShow;
	/**
	 * @var string a javascript function that fires on tab show after a tab has been shown. Use `event.target` and
	 * `event.relatedTarget` to target the active tab and the previous active tab (if available) respectively.
	 */
	public $onShown;
	/**
	 * @var array the HTML attributes for the widget container.
	 */
	public $htmlOptions = array();
	/**
	 * @var string[] the Javascript event handlers.
	 */
	protected $events = array();

	/**
	 * Widget's initialization method
	 */
	public function init()
	{
		$this->attachBehavior('TbWidget', new TbWidget);
		$this->copyId();
		$this->htmlOptions = TbHtml::defaultOption('placement', $this->placement, $this->htmlOptions);
		$this->initEvents();
	}

	/**
	 * Initialize events if any
	 */
	public function initEvents()
	{
		foreach (array('onShow', 'onShown') as $event)
		{
			if ($this->$event !== null)
			{
				$modalEvent = strtolower(substr($event, 2));
				if ($this->$event instanceof CJavaScriptExpression)
					$this->events[$modalEvent] = $this->$event;
				else
					$this->events[$modalEvent] = new CJavaScriptExpression($this->$event);
			}
		}
	}

	/**
	 * Widget's run method
	 */
	public function run()
	{
		$this->tabs = $this->normalizeTabs($this->tabs);
		echo TbHtml::tabbable($this->type, $this->tabs, $this->htmlOptions);
		$this->registerClientScript();
	}

	/**
	 * Normalizes the tab configuration.
	 * @param array $tabs a reference to the tabs tab configuration.
	 */
	protected function normalizeTabs($tabs)
	{
		$controller = $this->getController();
		if (isset($controller))
		{
			foreach ($tabs as &$tabOptions)
			{
				$items = TbHtml::getOption('items', $tabOptions, array());
				if (!empty($items))
					$tabOptions['items'] = $this->normalizeTabs($items);
				else if (isset($tabOptions['view']))
				{
					$view = TbHtml::popOption('view', $tabOptions);
					if ($controller->getViewFile($view) !== false)
						$tabOptions['content'] = $controller->renderPartial($view, $this->viewData, true);
				}
			}
		}
		return $tabs;
	}

	/**
	 * Registers necessary client scripts.
	 */
	public function registerClientScript()
	{
		$selector = '#' . $this->htmlOptions['id'];
		Yii::app()->clientScript->registerScript(__CLASS__.$selector, "jQuery('{$selector}').tab('show');");
		$this->registerEvents($selector, $this->events);
	}
}